Padlock.



No; 734,119. PATENTED JULY 21, 1903. N. W. CRANDALL' PADLOGK.

APILIOATION FILED APR. 16. 1903.

NO MODEL.

H WITNESSES. nul II I HWENTOH 5 jlzzifl/l mmw/zu A rromve Y UNITEDSTATES Patented. July 21, 1903 PATENT OFFICE.

NATHAN W. CRANDALL, OFMERIDEN, CONNECTICUT, ASSIGNOR TO THE RUSSELL &ERWIN MANUFACTURING COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATIONOF CONNECTICUT.

PADLOCK.

SPECIFICATION forming part of Letters Patent N 0. 734,119, dated July21, 1903. Application filed April I6, 1908. Serial Nil-152,832- (NomodeLl To all whom/it may concern:

Be it known that I, N ATHAN W. CRANDALL, a citizen of the United States,residing at Meriden, in the county of New Haven, State of Connecticut,have invented certain new andtion of a padlock which shall be simple,ef-

fective, and durable. I

In the drawings, Figure 1 is an elevation of a padlock with thecover-plate removed and showing the hasp closed and locked. Fig. 2 isasimilar view showing the hasp open. Fig. 3 is a side elevation of adetached detail of construction. Fig. 4 is a plan view of the detailshown in Fig. 3. Fig. 5 is a side elevation of another detail ofconstruction, and Fig. 6 is an end elevation thereof. Fig. 7 is a frontelevation of the complete article.

1 is the lock case or frame.

2 is a hasp pivoted to the case at 3. The free end of the hasp isprovided with a notch 4.

5 is a locking-dog pivoted at 6 and taking a swinging motion. The dog 5carries the nose 7, which serves as the locking member,

. desired number of tumblers employed.

adapted to enter the notch 4 of the hasp when the padlock is closed.

8 8 are tumblers pivoted at 9 and actuated by a spring or springs 10.There may be any In the free end of each tumbler there is a notch 1 1.

12 is a lug on the dog 5, which lug 12 lies adjacent to the end of thetumber or tumblers 8. 13 is a spring arranged to cause said dog 5 toswing, so as to normally throw the locking-nose 7 into its operativeposition.

From the foregoing it will be seen that when the key is inserted in thelock and the tumblers 8 8 raised to the proper elevation their notcheswill register in front of the lug '12.

In the form shown I have provided a supplemental device which I shallterm a protector-lever 14, pivoted at 15. The protector-lever 14 carriesa shield 16 at one end and at the other end a tail 17, which liesadjacent to an extension or heel 18 at the inner pivotgage the horn 21on the dog 5.

ed end of hasp 2. When the hasp 2 is closed, its heel 18 is locked bythe tail 17 of the protector-lever 14. This is best seen in Fig. 1. Whenthe lock is opened, the protector-lever first swings on its pivot, sothat its tail 17 will clear the hasp-heel 18, whereupon the hasp mayswing back to the position indicated in Fig. 2. In this position theheel 1S overstands the tail of the protector-lever, as shown in Fig. 2,locking said protector-lever 14 in the position shown.

19 is a spring which may be supported on pivot 15, carried by thecase 1. One end of the spring 19 may bear against the shield 16, Whilethe other end may bear in a notch on the side of the heel 18. Theinfluence of the spring is such as to swing the protector-lever 1 to thepositions shown in Fig. 2. In this position the shield 16 stands-infront of a stop 24 on locking-nose 7. A slot 20 may be provided in thedog 5, through which the pivot 15 mayindependently pass. A horn 21 mayalso be formed on the dog 5, against which the key may act.

22 is a key-hub carried by the case 1.

23 conventionally represents aportion of a key.

A cover-plate 25, constituting part of the case, is of course employed.The same corresponds, substantially, in shape to the member l and may beapplied when the mechanism is assembled and secured to the frame or case1 in any desired manner.

From the foregoing description the opera tion of the padlock will beseen to be as follows: Assuming the parts are in the position indicatedin Fig.1, when a proper key is inserted androtated it moves the tumblers8 8 to a position where their notches will arrange in front of the lug12. The key will then'en- The further rotation of the key will swing thedog from the position indicated in Fig. l to the position indicated inFig. 2, the lug 12 entering the notches in the tumblers and the nose 7being withdrawn from notch 4. Then under the influence of the spring 19the hasp will be swung back to the position indicated in Fig.

2 and the protector-lever 14 will tilt, swinging the shield 16 upward,contracting the opening previously occupied by the end of the hasp 2.This shield 16 will then stand in front of a downward projection or stop24 on the nose 7, and will hence hold the dog back, so that the lug 12will remain in the notches in the tumblers. The hasp 2 in swinging backlocks the protector-lever 14 against movement.Henceitisimpossibletointroduceany tool into the case through thehasp-opening to tamper with the internal mechanism. The protector-lever14 will continue to be locked until the hasp 2 is swung back to nearlythe position indicated in Fig. 1. When the end of the hasp 2 engageswith the protector-plate 14, the heel 18 will clear the tail 17 of theprotector-lever, whereupon it may be swung down into the position shownin Fig. 1,wherein said tail will stand in front of and block the haspextension. The depressing of the protector-plate causes the same toclear the extension 24on thelocking-nose 7,which then under theinfluence of spring 13 moves to the left and enters the notchin thehasp, locking the same.

It should be stated that the locking-nose 7 is preferably formedintegrally with the dog 5 and that portion of the locking-nose whichextends into the notch is doubled upon itself to reinforce andstrengthen the same to prevent the hasp being torn open, excepting bythe application of such force as would practically destroy the lock orany portion thereof.

\Vhile I have shown in the drawings the preferred form of the invention,it is obvious that changes in the particular form and arrangement of theparts may be made without departing from the spirit and scope thereof.

What I claim is 1. In a padlock, a hasp, a notched tumbler, a dog, apivot therefor, a locking-nose carried by said dog, a lug carried bysaid dog for engaging with the notch in the tumbler, a protection-lever,a pivot therefor one end of the lever being provided with a shieldunderlying the opening in the case to receive the free end of the hasp,the other end of said protector-lever being provided with a tailarranged to engage with the heel of the hasp when the padlock is closedand locked.

2. In a padlock, a case, a hasp pivoted at one end therein, a notchedtumbler, a pivoted dog arranged to be actuated by a key, a locking-nosecarried by said dog, a lug on said dog arranged to engage in the notchin the tumbler, a pivoted protector-plate, one end thereof projectinginto the path of movement of the free end of the hasp as the lock isclosed, the other end of said lever constituting a tail arranged toengage with the heel of the hasp when said hasp is closed and actingconjoint-1y with said locking-nose in holding said hasp in the closedposition.

3. In a padlock, a casing, a pivoted hasp, a notched tumbler, a dogarranged to be actuated by a key, a locking-nose on said dog, a lug onsaid dog arranged to engage in the notch in said tumbler, a lever, apivot therefor, one end of said lever lying adjacent to the heel of thehasp and arranged to engage the heel of the hasp when said lever istilted by the closing hasp.

4. In a padlock, a casing, a hasp, key-operated means for locking saidhasp, a lever, a shield carried thereby and movable therewith forcontracting the hasp-opening in the case when the end of the hasp isremoved therefrom.

5. In a padlock, a casing, a hasp, key-operated means for locking saidhasp, a lever, a shield carried thereby and movable therewith forcontracting the opening into the case arranged to receive the free endof the hasp, and a tail at the other end of said lever arranged to beblocked by the heel of the hasp when the padlock is unlocked to preventdisplacement of the said shield.

6. In a padlock, a case, a hinged hasp, a swinging dog, a locking-nosecarried by said dog, a pivoted protector-lever arranged to engage withthe dog and hold it out of its operative position when the hasp is open,said hasp being arranged to engage with the lever to hold it inengagement with said dog during the period when said hasp is open.

7. In a padlock, a hinged hasp, a pivoted 1ocking-dog,key-operated meansto move said dog, a pivoted protector -1ever carrying a shield adjacentto the opening in the case into which the free end of the hasp isarranged to enter, said protector-lever being locked against movement bythe heel of the hasp when the hasp is open, said hasp being locked bysaid lever when said hasp is in its closed position.

Signed at New Britain, Connecticut, this 14th day of April, 1903.

NATHAN W. ORANDALL. Witnesses:

M. S. WIARD, W. E. WIGHTMAN.

